Fig. 1

Distribution and complexity variation of sRNA in litchi pericarp. (a) Size class distribution of 20 ~ 24-nt sRNA reads during ambient and post-cold storage. The composition of sRNA classes is shown for each of the storage time points, defined as 0 d and 4 d at 25 °C, and 0 h, 24 h and 48 h at 25 °C after 2-week cold storage at 1 °C. rRNA and tRNA sequences are removed. (b) Change of the complexity for different size classes and all sRNA reads during ambient and post-cold storage. The complexity index is calculated as unique read count divided by total read count for all and each size class separately. Higher index represents more diverse sRNA sequence composition